CVE-2026-93214 (GCVE-0-2026-93214)

Vulnerability from cvelistv5 – Published: 2026-09-24 15:10 – Updated: 2026-10-19 09:07
VLAI
Title
usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_tcm: fix deadlock in usbg_make_tpg() usbg_make_tpg() held dep_lock while calling configfs_depend_item_unlocked(), which acquires the configfs root inode lock when operating across subsystems. This creates a circular lock dependency with configfs_rmdir(): dep_lock -> configfs root inode lock -> su_mutex -> dep_lock In usbg_make_tpg(), dep_lock only serialized the read of opts->ready, which is a monotonic flag that transitions from false to true exactly once (in tcm_set_name()) and never reverts. Remove dep_lock from usbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access opts->ready locklessly instead.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6996 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277 (git)
Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < 3639438a4c83ffc2e564c8c010b92137c5d11cfa (git)
Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < 78a14ea2284825055ab6c2a1f3489510f560f3a2 (git)
Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < eef3e62f90d86c1c5651742f84ecc9db1814a893 (git)
Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < f81a2da137b029a282b9bc64d2f267d242948659 (git)
Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < 6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9 (git)
Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < d90b0f90e30cd59b36005a4016b15cf02bcd7fb2 (git)
Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < 9dbf74f4022f80f7669d2b3c22c5deb46c1b5674 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.5
Unaffected: 0 , < 4.5 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_tcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "3639438a4c83ffc2e564c8c010b92137c5d11cfa",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "78a14ea2284825055ab6c2a1f3489510f560f3a2",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "eef3e62f90d86c1c5651742f84ecc9db1814a893",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "f81a2da137b029a282b9bc64d2f267d242948659",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "d90b0f90e30cd59b36005a4016b15cf02bcd7fb2",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "9dbf74f4022f80f7669d2b3c22c5deb46c1b5674",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_tcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.5"
            },
            {
              "lessThan": "4.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_tcm: fix deadlock in usbg_make_tpg()\n\nusbg_make_tpg() held dep_lock while calling\nconfigfs_depend_item_unlocked(), which acquires the configfs root\ninode lock when operating across subsystems. This creates a circular\nlock dependency with configfs_rmdir():\n\n  dep_lock -\u003e configfs root inode lock -\u003e su_mutex -\u003e dep_lock\n\nIn usbg_make_tpg(), dep_lock only serialized the read of opts-\u003eready,\nwhich is a monotonic flag that transitions from false to true exactly\nonce (in tcm_set_name()) and never reverts. Remove dep_lock from\nusbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access\nopts-\u003eready locklessly instead."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:07:26.196Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277"
        },
        {
          "url": "https://git.kernel.org/stable/c/3639438a4c83ffc2e564c8c010b92137c5d11cfa"
        },
        {
          "url": "https://git.kernel.org/stable/c/78a14ea2284825055ab6c2a1f3489510f560f3a2"
        },
        {
          "url": "https://git.kernel.org/stable/c/eef3e62f90d86c1c5651742f84ecc9db1814a893"
        },
        {
          "url": "https://git.kernel.org/stable/c/f81a2da137b029a282b9bc64d2f267d242948659"
        },
        {
          "url": "https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/d90b0f90e30cd59b36005a4016b15cf02bcd7fb2"
        },
        {
          "url": "https://git.kernel.org/stable/c/9dbf74f4022f80f7669d2b3c22c5deb46c1b5674"
        }
      ],
      "title": "usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93214",
    "datePublished": "2026-09-24T15:10:36.975Z",
    "dateReserved": "2026-09-17T16:02:15.093Z",
    "dateUpdated": "2026-10-19T09:07:26.196Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-93214",
      "date": "2026-10-19",
      "epss": "0.00176",
      "percentile": "0.06777"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-29T02:12:18.000Z",
      "cve": "CVE-2026-93214",
      "id": "msrc_CVE-2026-93214",
      "initial_release_date": "2026-09-28T04:01:54.000Z",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-93214.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/usb/gadget/function/f_tcm.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277",
                    "status": "affected",
                    "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "3639438a4c83ffc2e564c8c010b92137c5d11cfa",
                    "status": "affected",
                    "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "78a14ea2284825055ab6c2a1f3489510f560f3a2",
                    "status": "affected",
                    "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "eef3e62f90d86c1c5651742f84ecc9db1814a893",
                    "status": "affected",
                    "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "f81a2da137b029a282b9bc64d2f267d242948659",
                    "status": "affected",
                    "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9",
                    "status": "affected",
                    "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "d90b0f90e30cd59b36005a4016b15cf02bcd7fb2",
                    "status": "affected",
                    "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "9dbf74f4022f80f7669d2b3c22c5deb46c1b5674",
                    "status": "affected",
                    "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/usb/gadget/function/f_tcm.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "4.5"
                  },
                  {
                    "lessThan": "4.5",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.270",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.221",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.188",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.157",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.109",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.50",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.4",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_tcm: fix deadlock in usbg_make_tpg()\n\nusbg_make_tpg() held dep_lock while calling\nconfigfs_depend_item_unlocked(), which acquires the configfs root\ninode lock when operating across subsystems. This creates a circular\nlock dependency with configfs_rmdir():\n\n  dep_lock -\u003e configfs root inode lock -\u003e su_mutex -\u003e dep_lock\n\nIn usbg_make_tpg(), dep_lock only serialized the read of opts-\u003eready,\nwhich is a monotonic flag that transitions from false to true exactly\nonce (in tcm_set_name()) and never reverts. Remove dep_lock from\nusbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access\nopts-\u003eready locklessly instead."
          }
        ],
        "id": "CVE-2026-93214",
        "lastModified": "2026-10-19T10:17:12.323",
        "metrics": {},
        "published": "2026-09-24T16:17:16.397",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/3639438a4c83ffc2e564c8c010b92137c5d11cfa"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/78a14ea2284825055ab6c2a1f3489510f560f3a2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9dbf74f4022f80f7669d2b3c22c5deb46c1b5674"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d90b0f90e30cd59b36005a4016b15cf02bcd7fb2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/eef3e62f90d86c1c5651742f84ecc9db1814a893"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f81a2da137b029a282b9bc64d2f267d242948659"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-09T17:04:35Z",
      "cve": "CVE-2026-93214",
      "id": "CVE-2026-93214",
      "initial_release_date": "2026-09-24T23:49:56Z",
      "product_status:known_affected": "263",
      "product_status:known_not_affected": "84",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-93214",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-93214.json",
      "version": "4"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.